Safety window lock adapter



May 10, 1949. i -w. E. FRIETscHE v 2,469,551

' SAFETY wINDow Loox ADAPTER Filed Feb. 25, 1947 'Willgml EL Friesdze lYLIM-Nlp 4W fist.

Patented May 10, 1949 SAFETY WINDOW LOCK ADAPTER William E. Frietsche, New Hyde Park, N. Y.

Application February 25, 1947, Serial No. 730,807

2 Claims.

This invention relates to improvements in locking devices and, more specifically, to a new and improved. safety window lock adapter designed for a more satisfactory interlocking of any objects which are shiftably arranged, as for instance Sliding doors, sliding Windows, vehicle doors and windows, elevator doors, cage closures, gates, shutters, and the like.

An object of the present invention is the provision of a device of the character described which will safely keep the objects in the position in which they are interlocked and which cannot be unlocked inadvertently nor can it be unlocked from the outer side of a room or the like for the locking of the windows or doors of which a window lock in connection with my adapter is employed;`

Another object of the present invention is the provision ofa device of the character described which can be attached easily to any existing windows, doors and the like without removing such windows, doors and the like from the structure, vehicle, etc. to which they are affixed;

Yet still another object of the present invention is the provision of a device of the character described which is light in weight, simple in construction and inexpensive to manufacture, but which is sturdy and well adapted to withstand the rough. usage to which such devices are ordinarily subjected.

A further object of the present invention is the provision of a device of the character described which makes it possible to determine by means of visual inspection from a distance whether or not a window or the like is locked thus greatly reducing Jche time and elort of janitors and the like necessary for making sure that all windows in a large room or building are properly locked.

Still a further object of the present invention is the provision of a device of the character described which prevents the locking cam of a window lock from laterally protruding over the sash Whenever the cam is out of engagement with the locking hook, so that-irrespective of the position of said cam-a window may be raised or lowered without damaging any part of the glass or frame due to the lock being partially or fully closed but not engaged.

With the foregoing and other objects in View which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed. f

In the accompanying drawings the preferred forms of the invention have been shown.

In said drawings:

Figure 1 is a top plan view of a preferred ernbodiment of my invention;

f Figure 2 is a side elevation of the same as it appears when installed and when the lock is closed; and

Figure 3 is a side elevation as Figure 2, but with the lock being open.

y Similar reference characters refer to similar parts throughout the several views.

While my device can be used in connection with locking and interlocking devices for a great variety ci shiftable objects, it is shown in the drawing as applied only to a window which has a lower inner window frame 2 and an upper outer window frame 3. The frames 2 and 3, which hold the Window panes I and 5 and which form no part of my present invention, are up and down shiftable in a well-known manner and are shown in the drawing in closed position. My improved locking device consists primarily of a longitudinal bar I and of a pair of plates 6 and 'I which are hinged to one another at 8. In the instance shown my new and improved device is illustrated in connection with an ordinarywindow lock consisting of a hook member 9, and a cam member IU which is pivoted upon the usual base I I. The parts 9 to Il inclusive, not forming a part of my present invention, are indicated in dash-anddotted lines in Figures 2 and 3.

The bar 4 is of a thickness which equals that of the pair of plates 6 and 'I together, so that the parts 9 and II are on the same level when the plates 6 and 'I are interposed between the frame or sash 2 and the base II, and the bar 4 is interposed between the frame or sash 3 and the hook member 9, as may be seen in Figure 2. Instead of the bar 4 there could be used two plates (not shown) each of which is of the same thickness as the plate 6 or the plate 1, The bar 4 is provided with kholes which register with holes in the hook member 9 through which are extended the screws I2. In this way the parts 4 and 9 can be secured to the frame 3 by means of only one pair of screws I2, thus making it unnecessary to drill additional holes into the frame 3 for the securing of the bar 4. The base I I can be secured to the plate 1' by any suitable means, preferably by means of countersunk screws I4 and nuts I5, the former being extended through the screw holes in the base II and through holes in the plate I which register with said screw holes in the base Il. The plate 6 is secured to the frame 2 preferably by means of two pairs of countersunk screws i6 and l1. The holes in plate 6 through which the screws I6 are extended preferably register with those in the base Il, so that only two new holes for the screws l1 have to be drilled into the frame 2 for interposing the plates 6 and 1 between the frame 2 and the base ll. By this arrangement of the holes for the screws Al2 zand t6 in the parts 4 and 6 respectively the time and effort required for installing my adapter is reduced to a minimum.

As shown in Figures 1 and 2, -that Medge portion oi the plate l which is opposite to the hinge 8 protrudes beyond the plate E. 'This makes it impossible to dislocate the cam member l by means of a knife blade or the like `inserted through the gap i8, when the window is 'closed and locked as shown in Figure 2. In this way said protruding edge portion, which overlaps fon the frame 3, alfords an additional protection against burglara which additional protection is absent if a window yor the like is locked `only by means of an ordinary window lock.

The hinge '8 is provided with any suitable resilient means for spacing apart lthe plates 6- and 'l when the cam Amember l0 is disengaged from the hook 9, as may be seen -in Figure '-3. In

the instance shown, said resilient means consist of a coiled spring 20 (-Figure ll') which ris wound around a portion of the hinge fipin. The plate 6 is provided with an upwardly protruding -stop tongue 2i which is extended through a recess Z2 in the plate l in such a manner that it limits the movement of the plate 'I in a clockwise -di rection to about forty-five degrees.

'The lifting of the plate '1 through the force of the spring 2n from the position shown in Figures land 2 to that -of Iligure 3, upon unlocking of the parts v9 and I0, has three purposes. First, the edge portion of the plate '1, which in the position of Figure -2overlapson the frame v3 is out of the Way, so that the frame "2 can be lifted without said edge portion colliding with the hook v9; second, the cam member |50, even if it is brought back into its interlocking position after the frames 2 and 3 have 4'been moved relatively to one another, cannot touch or damage any part of Athe frame 3, thus eliminating the cause of many a window breakage; third, the unlocked condition of a closed =window can 'be seen more distinctly and from a larger distance than if the parts I0 and Il are directly attached to the window frame or sash in the old manner without the interposition o'f my new and improved adapter.

I claim:

1. A safety window lock adapter comprising a base plate adapted to be secured to one of a pair of relatively movable sashes in place of the cam member base of a window lock, a supporting plate hinged :to said base plate being of such a width that it protrudes over the front edge of `the sash to which said base plate is secured and yhaving' recesses in its thus protruding portion, a ":bar adapted to be interposed between the hook member of .a window lock and the other one of said pair of sashes and having a recessed `edge portion :into which fits the protruding portion of said supporting plate, and resilient means for spacing apart said base plate from said supporting plate, the latter being adapted for having the 1cam member'oi -a window lock secured thereto, :the thickness of said bar being equal to -that of said base plate and said supporting `plate together, all substantially as set forth.

`2. A device oi the -character described comprising a pair -o'f plates hinged to one another at fone of their edges and one plate having the main section of that edge portion which is opposite to the hinge protruding over said other plate, a bar whose thickness equals'the combined thickness of said `pairfo'f plates being adapted `to be interposed between `the yhook member lof an ordinary window lock and the one of a pair of relatively movable sashes and having a recessed edge portion into which fits the protruding section or one of said plates, and a spring -on said hinge adapted for spacing said pair of plates apart, the wider one of said pair -of plates being adapted for having the-cam memberof a window lock secured thereto, the other plate being adapted to be secured to the other one of the pair of sashes, all substantially as described.

WILLI-AM E. FRIETSCI-IE.

REFERENCES I'CITED The `following `references are `of record in the file kof this patent:

UNITED STATES PATENTS Number Name Date ,820,868 Hinchliie May 15, I1906 1,141,698 De Voe June 1,1915 

